Process for separating caoutchouc from resinous products.



G. F. PLAMANT. PROCESS FOR SEPARATING GAOUTOHOUO PROM RESINOUS PRODUCTS.APPLICATION FILED MAY 14, 1910. 965,098.

Patented July19, 1910, Hg 1;

' apparatus a vigorous mastication of the mathe cadet the masticationprocess is granulated and connnmuted 1n .extremel line r in France, haveinvented certain new an for, eictracting caoutchouc from products.

'or carbon tetrachlorid is added to the/mass bring the eaoutchc'uc intoa gelatinous state.

vtion of the resins.

'Above the masticating apparatus two resenenonen s FERDINAN ILAMANT, onrams, FRANCE.

rnoonss son ssramirme'oaouronouo rnoiannsmons rnonuors;

To all whom it may concern} Be it known that I, Gnoaens Esizm'nANn FLMANT, a citizen of the French Republic,

residing at Paris, Department of the Seine useful ImprovementsinProcesses for .Separating Caoutchouc 'from Resinous Products, of whichthe following is a specificationf The invention has for its object aprocess whether natural or not which contain it. For this purpose asolvent for eaoutchoue, such as for instance carbon bisulfid, benain tobe treated inquantityjjust sufii'cient to The material is :then treatedwith a substance which is capable .of dissolving the resins or otherimpurities Without dissolving the eaoutehouc, for example 'a methylorethyl alcohol, oraceton'e; By means of a grinding terial is thencarried out and on account of its soft condition the mass lends itselfwell to comminution and only-comparatively little mastication. bringsabout a' complete sol'u These are recovered by distillation and thereremains in the apparatus a mass of pure caoutchouc which at particles.The solvents remaining m the mass can therefore be completely removed,the removal being carried out by the aid of a vacuum.

In the accompanying drawing: Figure 1 represents diagrammatically anapparatus by means of which the process may be carried into effect, andFig. 2a detail view of the inspection. tube.

The apparatus comprises a' lnasticating chamber consisting of a vessel 1in which two horizontal shafts '2- and 3 carrying blades t and 5 aremounted. These bladesare rotated in opposite directions by means ofsuitable gearing operated by the driving shaft 6. The vessel 1 ismounted upon a support so that it can be tilted in order to decant thesolvents containing the resins.

voirs' 7 and 8-are situated, 7 containing the liquid employed to bringthe caoutchmm into a gelatinous state and the other 8 the liquid whichserves to dissolve the resins.

Specification of Lettersfateiit. I Patented-July Application fi eana'14, 1910. SerialNo. 561,387. r-

":Thdvessell is connected by a-pipe 91th a vacuum pump 10 and by meansof flexible tube ll'to an evaporator 12 adapted-torecei've the liquidscontaining-resins in solution. I This, vessel contains a thermometer l3and isprovided in its lower part with heatingchamber 14: into'which ispassed a current of steam. The upperfp'art; ot the .vessel 12communicates by means of a pipe 15 with a condensing worm '16 which isconflxible tube 11 between the masticatin'g apparatus and the evaporator12 there is =provided an inspection? tube allowing to inspect theliquid'i. e. resins during theidecantat'ion.

The inspection .tubeis of any drawings, it is' illustrated as an"apparatus consisting. in a glass cylinder 17 which is placed between twoplates 18, 18 and' 'nainnected tothe reservoirs-7 and -8. On'the' the.solvents containing -the type; in the I .tained by means 'of rods 19.The inspection tube isprov-ided at one end with a tube 20 screweddirectly;

thevessel 'l or connected to the fieziible tube 11 and at'the other" endwith a'tube 21 con 'nected to the flexible tube 11. power is requiredfor the-operation. This The operation of the device 1s as follows:

The mass, containing. the caoutclrouc is placed. in the comminutingapparatus and by means of suitable taps a'certain quantity of liquidfrom reservoir the vessel so as This operation can be repeated severaltimes in order to secure the-complete extraction of the resins. By meansof the inspection tube it is possible to watch the appearance of theliquid at what time it is-necessaryfto stop the decantation. Thevigorous mastication produced by the blades brings the mass ofcaoutchouc into a granu ous condition.

The shaft 6 of the masticating apparatus isin the walls or the cover ofthen stopped and the vacuum pump 10 is operated in order to extract fromthe .granu lous mass remaining in the masticating apparatus the lasttraces of the solvents; the vessel 1 may. advantageously be-heated atthe same time.

The evaporator 12 permits of a very rapid recovery of:

the auxiliary liquids employed,

Owing to the diiierence in their boiling points they can be easilyseparated and their vapors condensed in the worm 16. The liquidsrecovered are successively led into small quantity of liquid comparedwith the quantity of resinous material which it is capable of treating.The complete recovery of the solvents contained in the mass ofcaoutchoue can be accomplished and consequently the apparatus permits ofan economical and rapid treatment of the materials dealt with. I

I claim:

The process for extracting caoutchouc from'products containing the samewhich consists in adding to the product a' solvent for caoutehoue inquantity just sufiicient to bring the oaoutchouc into a gelatinousstate} submitting thesame to a vigorous mastication by meansof acomminuting apparatus havin horizontal shafts and treating the mass bymeans of a solvent for the resins, these solvents being collected bydecantation plete extraction of the resins has been ellected; thecaoutchoue remaining in the apparatus being freed from the last tracesof solvent by the aid of a vacuum with or without the'application ofheat.

In testimony whereof I have hereunto set my hand in presence of twosubscribing witnesses.

GEORGES FERDINAND FLKMANT.

EMILE KLoTz.

in an evaporating apparatus, the operation .being repeated several timesuntil a com-

